WASHINGTON, D.C. — The Association of American Railroads has signed a 33,619-square-foot lease with Bethesda, Md.-based Clark Enterprises for space in its Capitol View office building. The Class A property is located at 425 3rd St. in Washington. The association will move into the building in September, occupying 15 percent of the property. Scott Frankel, Art Santry and Doug Mueller of CB Richard Ellis’ Washington office represented the landlord. Bruce McNair and Josh Hartman of Grubb & Ellis’ Washington office represented the tenant.